import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login'
import Home from '../components/Home'
//导入全局样式表
import '../assets/css/golbal.css'

Vue.use(VueRouter)

const routes = [
  
]

const router = new VueRouter({
  routes: [
    { path: '/',redirect: '/login'},
    { path: '/login', component: Login },
    { path: '/home', component: Home}
  ]
})

//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to  将要访问的路径
  // form  表示从哪个路径跳转而来
  // next  是一个函数，表示放行
  //  next() 放行 next('/login') 强制跳转

  //如果访问用户的登录页，直接放行
  if(to.path === '/login') return next()
  //获取token
  const tokenStr = window.sessionStorage.getItem('token')
  //没有token就强制跳转到登录页
  if(!tokenStr) return next('/login') 
  next()
})


export default router